One word of warning: some animals love the smell of Milorganite. I think it's a raccoon that's been digging up my potted plants the last several nights in a row. My guess was it smelled the Milorganite, so I put out a small pile of it on my driveway. Next morning it was gone, so I assume it was eaten. I was hoping that would teach the critter that what it smells is not something good to eat, but I guess the stuff is tasty because he dug again the next night.
I haven't had any holes dug where I've used this on in-ground bamboo, except one that was planted in very loose soil and was right next to a large potted division -- so the digging frenzy in that pot may have carried over. I did have a couple of other freshly-planted plants dug up (not bamboos) where I used Milorganite in the holes.
The stuff does smell pretty good to me, but I'm not going to do a taste test.
